linux-kernel - Re: [PATCH 2/2] x86: replace BIO_VMERGE_BOUNDARY with BIOVEC_PHYS

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Date:	Mon, 27 Oct 2008 20:18:44 +1100
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
CC:	linux-kernel@...r.kernel.org, mingo@...e.hu, jens.axboe@...cle.com
Subject: Re: [PATCH 2/2] x86: replace BIO_VMERGE_BOUNDARY with BIOVEC_PHYS_MERGEABLE

FUJITA Tomonori wrote:
> I'm not familiar with what Xen does but why can't Xen just override
> BIOVEC_PHYS_MERGEABLE?
>
> Why does Xen need to hook BIOVEC_PHYS_MERGEABLE to the iommu_bio_merge
> parameter (as this patch does)? BIOVEC_PHYS_MERGEABLE and the
> iommu_bio_merge parameter are not related at all.
>   

No, it doesn't.  It was convenient to reuse that mechanism, but I can 
easily re-add something else (which would be more or less identical).

    J

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